to think of something briefly
ふと何かを思いつく (futo nanika o omoitsuku)
"It never crossed my mind that he could lie."
"彼が嘘をつくなんて考えもしなかった。" (kare ga uso o tsuku nante kangae mo shinakatta)
to think carefully about something
to admit or confess to something.
to make time, money, or space available
to be extremely frightened
to make a decision that cannot be reversed
something that completely changes the way things are done